Inventor · disambiguated record
Petrus J. A. M. Derks
Also filed as: DERKS PETRUS J A M · DERKS PETRUS J M · DERKS PETRUS JOHANNES MARIA
11 granted patents·63 citations·filing 1979–1998
88Inventor score
Top patents by PatentIndex Score
11 records- 0155US5030879ACathode for an electric discharge tubePHILIPS CORP·Filed 1990·Granted Jul 9, 1991·12 cites·9 claims
- 0249US5347194AOxide cathode with rare earth additionPHILIPS CORP·Filed 1993·Granted Sep 13, 1994·9 cites·18 claims
- 0347US5146131AAlkaline earth metal oxide cathode containing rare earth metal oxidePHILIPS CORP·Filed 1991·Granted Sep 8, 1992·8 cites·6 claims
- 0447US5075589AOxide cathodePHILIPS CORP·Filed 1990·Granted Dec 24, 1991·11 cites·19 claims
- 0546US5059856AOxide cathodePHILIPS CORP·Filed 1989·Granted Oct 22, 1991·6 cites·6 claims
- 0636US5665501APhotoconductive element with polycarbonate binderOCE NEDERLAND BV·Filed 1996·Granted Sep 9, 1997·5 cites·13 claims
- 0735US5952142AAzine-containing photoconductive elementOCE TECH BV·Filed 1998·Granted Sep 14, 1999·6 cites·7 claims
- 0834US5277637ACathode for an electric discharge tubePHILIPS CORP·Filed 1992·Granted Jan 11, 1994·3 cites·11 claims
- 0931US4348610ACamera tube with graded tellurium or arsenic targetPHILIPS CORP·Filed 1980·Granted Sep 7, 1982·2 cites·7 claims
- 1029US4254359ACamera tube with graduated concentration of tellurium in targetPHILIPS CORP·Filed 1979·Granted Mar 3, 1981·1 cites·6 claims
- 1126US4319159ACamera tube selenium target including arsenic increasing in concentration from radiation sidePHILIPS CORP·Filed 1979·Granted Mar 9, 1982·0 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →